2008 Jeep Wrangler Owner's Manual - Page 288

STARTING AND OPERATING 287 WARNING! You or others could be injured if you leave the vehicle unattended with the transfer case in the N (Neutral) position without first fully engaging the parking brake. The transfer case N (Neutral) position disengages both the front and rear driveshaft from the powertrain, and will allow the vehicle to move regardless of the transmission position. The parking brake should always be applied when the driver is not in the vehicle. Shift Positions For additional information on the appropriate use of each transfer case mode position, see the information below: 2H Position This range is used for normal street and highway driving. Hard surfaced roads. 4H Position This range locks the front and rear driveshafts together, forcing the front and rear wheels to rotate at the same speed. This range (4H) provides additional traction for loose, slippery road surfaces and should not be used on wet or dry pavement. The 4WD Indicator Light (located in the instrument cluster) will illuminate when the transfer case is shifted into the 4H position. 5